env: Adjust the get_char() method to return an int
In principle this can fail, e.g. if the index is out of range. Adjust the
driver signature to allow returning an error code.
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Tom Rini <trini@konsulko.com>
diff --git a/include/environment.h b/include/environment.h
index 9a44215..ba8af28 100644
--- a/include/environment.h
+++ b/include/environment.h
@@ -227,9 +227,9 @@
* will read from gd->env_addr.
*
* @index: Index of character to read (0=first)
- * @return character read
+ * @return character read, or -ve on error
*/
- unsigned char (*get_char)(int index);
+ int (*get_char)(int index);
/**
* load() - Load the environment from storage